In this process, China has played an active role in enhancing economic regional cooperation.

中国在此区域经济合作方面发挥着积极作用。

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As a result, it has played an active role in promoting real estate products exchanging and circulating.

房地产经纪市场不断充实，渐成规模，对活跃房地产交易，促进房地产商品交换起到了积极的作用。

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The establishment of welfare system in western countries has played an active role in enhancing social progress.

西方国家福利制度的创设，对人类社会的进步起到了积极的作用。

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For more than a decade, the Mexican government has played an active role advocating for millions of migrants abroad.

CNN: Mexico 'welcomes' new U.S. immigration reform push

And he has played an active role in such key organizations as the Preparatory Committee, the Beijing-appointed body on transition matters.

CNN: THE NEW ELITE

Toward the end of the interview, Costolo found time to discuss the 2012 presidential campaign, in which Twitter has played an active role.

CNN: Mark Milian,